Why am i getting a 'keyerror' when accessing python dictionary values?

A 'KeyError' in Python occurs when you try to access a dictionary key that doesn't exist. Always ensure the key is present before accessing its value. Example:

my_dict = {'apple': 1, 'banana': 2}
value = my_dict['cherry']

value = my_dict.get('cherry', default_value)
Use the `get()` method of dictionaries to avoid `KeyError` by providing a default value.

Beginner's Guide to Python